Corsair
Corsair RM1000x Shift
1000 W · 80+ Gold · ATX 3.1
92
/ 100
From $229
VS
Corsair RM1000x Shift wins by 3
Corsair
Corsair RM850e
850W · 80+ Gold · 12VHPWR
89
/ 100
From $139
Specdex verdict
Corsair RM1000x Shift takes it — here’s why.
In our weighted Specdex score, Corsair RM1000x Shift lands at 92 and Corsair RM850e at 89. That puts Corsair RM1000x Shift ahead by 3 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Corsair RM1000x Shift if…
- ✓ATX 3.1 + 12V-2x6
- ✓Side-mounted cables
- ✓Quiet zero-RPM
Pick Corsair RM850e if…
- ✓Sub-$150 12VHPWR-ready PSU
- ✓80+ Gold + Cybenetics Gold
- ✓7-year warranty
Corsair RM1000x Shift 92
vs 89 Corsair RM850e
Score breakdown
Corsair RM1000x Shift
92 efficiency 90
noise 94
cables 96
value 88
build 0
features 0
Corsair RM850e
89 efficiency 92
noise 0
cables 0
value 96
build 90
features 88
Specs side-by-side
| Spec | Corsair RM1000x Shift | Corsair RM850e |
|---|---|---|
| Wattage | 1000 W | 850W |
| Efficiency | 80+ Gold | 80+ Gold |
| Standard | ATX 3.1 | — |
| Connectors | 1× 12V-2x6 (600W) | — |
| Fan | 135 mm FDB | — |
| Cooling | — | 120 mm rifle-bearing fan |
| Modular | — | Fully modular |
| 12VHPWR | — | 1× 600W native |
| Warranty | — | 7 years |
Corsair RM1000x Shift
Pros
- +ATX 3.1 + 12V-2x6
- +Side-mounted cables
- +Quiet zero-RPM
Cons
- −Bulky side depth
- −Price creep
- −Gold not Platinum
Corsair RM850e
Pros
- +Sub-$150 12VHPWR-ready PSU
- +80+ Gold + Cybenetics Gold
- +7-year warranty
Cons
- −Single-rail design (mostly fine)
- −Cables ribbon-flat (some prefer round)
- −No iCUE Link
FAQ: Corsair RM1000x Shift vs Corsair RM850e
Which is better, Corsair RM1000x Shift or Corsair RM850e? +
Corsair RM1000x Shift scores 92 on our weighted rubric — ahead by 3. Your best pick depends on the sub-scores above.
Is Corsair RM1000x Shift worth the price? +
At $229, Corsair RM1000x Shift delivers a Specdex score of 92 — strongest in cables.
Is Corsair RM850e worth the price? +
At $139, Corsair RM850e delivers a Specdex score of 89 — strongest in value.
Does Corsair RM1000x Shift or Corsair RM850e last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.